iPhone: How to play local notification sound loud independent of volume setting?

Question

The FoneHome iPhone app has a feature where you can play a sound as part of a local notification. That sound is loud regardless of what the iPhone\'s volume level is set at.

Answer 1

Try using the following code

NSURL *url = [NSURL fileURLWithPath:[NSString stringWithFormat:@"%@/audiofile.mp3", [[NSBundle mainBundle] resourcePath]]];
NSError *error;
audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:&error];
[audioPlayer setVolume:x];
if (audioPlayer == nil)
    NSLog([error description]);             
else 
    [audioPlayer play];

Here 'x' is a floating point value which normally ranges from 0.0 to 1.0. However to increase the Volume level assign x value >10.0. But doing this may distort the sound a bit.